A.時(shí)點(diǎn)指標(biāo)
B.時(shí)期指標(biāo)
C.總量指標(biāo)
D.質(zhì)量指標(biāo)
E.數(shù)量指標(biāo)
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A.全部大學(xué)畢業(yè)生是研究總體
B.大學(xué)畢業(yè)生總數(shù)是統(tǒng)計(jì)指標(biāo)
C.大學(xué)畢業(yè)生就業(yè)率是統(tǒng)計(jì)標(biāo)志
D.反映每位大學(xué)畢業(yè)生特征的職業(yè)是數(shù)量指標(biāo)
A.全距
B.標(biāo)準(zhǔn)差
C.平均差
D.標(biāo)準(zhǔn)差系數(shù)
A.提高
B.下降
C.不變
D.條件不夠,無法判斷
A.每個(gè)組的最小值
B.每個(gè)組的最大值
C.全距中的最大值
D.全距中的最小值
A.80%~89%,90%~99%,100%~109%,110%以上
B.80%以下,80.1%~90%,90.1%~100%,100.1%~110%
C.90%以下,90%~100%,100%~110%,110%以上
D.85%以下,85%~95%,95%~100%,105%~115%
最新試題
對(duì)全國(guó)各鐵路交通樞紐的貨運(yùn)量、貨物種類等進(jìn)行調(diào)查,以了解全國(guó)鐵路貨運(yùn)概況。這種調(diào)查屬于()
If data are grouped into intervals and the number of items in each group is listed, this could be called a ()
什么是季節(jié)變動(dòng)?研究它的意義何在?如何測(cè)定季節(jié)變動(dòng)?
A cumulative frequency polygon is also called ().
Which of the following is not the goal of descriptive statistics?()
為什么在計(jì)算平均指標(biāo)的基礎(chǔ)上還有必要進(jìn)一步計(jì)算變異指標(biāo)?
The number of phone calls arriving at a switchboard each hour has been recorded and the following frequency distribution has been developed.What is the approximate range of the number of phone calls arriving each hour?()
企業(yè)生產(chǎn)一種產(chǎn)品需順次經(jīng)過四個(gè)車間,這四個(gè)車間的廢品率分別為1.5%、2.0%、2.0%和1.0%。該企業(yè)生產(chǎn)這種產(chǎn)品的平均廢品率是多少?
One advantage of a stem and leaf plot over a frequency distribution is that ().
常用的長(zhǎng)期趨勢(shì)測(cè)定的方法有哪些?各有什么特點(diǎn)?